18485616133 has 2 divisors, whose sum is σ = 18485616134. Its totient is φ = 18485616132.

The previous prime is 18485616119. The next prime is 18485616209. The reversal of 18485616133 is 33161658481.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13488964164 + 4996651969 = 116142^2 + 70687^2 .

It is a cyclic number.

It is not a de Polignac number, because 18485616133 - 2⁵ = 18485616101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18485616113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9242808066 + 9242808067.

It is an arithmetic number, because the mean of its divisors is an integer number (9242808067).

Almost surely, 2^18485616133 is an apocalyptic number.

It is an amenable number.

18485616133 is a deficient number, since it is larger than the sum of its proper divisors (1).

18485616133 is an equidigital number, since it uses as much as digits as its factorization.

18485616133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 414720, while the sum is 46.

The spelling of 18485616133 in words is "eighteen billion, four hundred eighty-five million, six hundred sixteen thousand, one hundred thirty-three".